Here is the full list of all 50 Card Hunter achievements.
Win 1000 league games
Complete AI hard mode
Complete all AI quests
Collect all Citadel legendaries
Complete Acquisitions Incoporated
Win 1000 ranked MP games
Complete all Citadel quests
Collect all AotA epics
Collect all base set legendaries
Collect all Citadel epics
Collect all base set rares
Complete all AotA quests
Collect all AotA legendaries
Collect all AotA rares
Collect all Citadel rares
Get MP rating to 1800
Get MP rating to 1700
Complete all campaign quests
Collect all base set epics
Get MP rating to 1600
Collect all base set uncommons
Get MP rating to 1400
Win 100 league games
Collect all base set commons
Get MP rating to 1500
Complete Expedition to the Sky Citadel
Complete Attack of the Artifacts
Win 10 league games
Get MP rating to 1300
Get MP rating to 1200
Win 100 ranked MP games
Complete the campaign cooperatively
Complete all Basic Edition treasure hunts
Win one league game
Complete a quest
Complete all campaign adventures
Complete the campaign
Get MP rating to 1100
Find the Hidden Bandit
Get MP rating to 1000
Find the Loot Fairy
Defeat Melvelous the Magnificent
Win 10 ranked MP games
Get MP rating to 800
Get MP rating to 500
Defend Woodhome from the undead
Complete an adventure cooperatively
Collect one legendary item
Win one ranked MP game
Save Ommlet from the Kobolds